JP2012206424A - Channel member, liquid ejection head, liquid ejecting apparatus, and channel member manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a channel member, along with a liquid ejection head and a liquid ejecting apparatus, for preventing the outflow and the mixture of the liquid due to destruction.SOLUTION: The channel member includes a cover 30 dividable by a base 31 and a cover part 32, and a channel member body 40 having a multilayer structure with a liquid channel formed therein. At least one member of the cover and the channel member body includes a first abutment part 612b protruding toward the other member, and a second abutment part 327 arranged in an area that is nearer to a fastening member 37 than the first abutment part 612b. The first abutment part 612b is brought into abutment with the other member before the base 31 and cover part 32 are fastened by the fastening member 37. Also, the second abutment part 327 has a gap between the second abutment part and the other member, and the fastening member 37 is fastened. Accordingly, the distance between the second abutment part 327 and the other member may be shortened.

Description

The present invention relates to a channel member in which a channel through which a liquid flows is formed, a liquid ejecting head including the channel member, a liquid ejecting apparatus including the channel member, and a method for manufacturing the channel member.

An ink jet recording head, which is an example of a liquid ejecting head, discharges ink droplets from a nozzle opening by causing a pressure change in a pressure generating chamber communicating with the nozzle opening.

Here, there has been proposed an ink jet recording head provided with a valve unit which is a flow path member (see, for example, Patent Document 1).

Such a valve unit is configured such that a flow path member main body is held inside a cover. The flow path member body is provided with a flow path, and in the middle of the flow path, a pressure adjustment chamber and a valve body that opens and closes due to a pressure change in the pressure adjustment chamber are provided.

JP 2007-260948 A

In such a flow path member, a flow path member main body having a laminated structure in which a flow path is formed is held inside a separable cover. The divided covers are integrally fixed by fastening members such as screws. However, when the fastening member is fastened, if the cover and the flow path member main body first come into contact with each other in the fastening area around the fastening member, the flow path forming area in which the flow path of the flow path member main body is formed. Due to the pressing failure of the flow path forming region of the flow path member main body, gaps are generated between the members constituting the flow path member main body, causing problems such as ink leakage and mixing of different types of ink. There is a problem that occurs.

In particular, when the flow path member bodies having a laminated structure are bonded to each other, the above-described problems are likely to occur when the flow path member main bodies are held in the cover before the adhesive is cured. For this reason, it may be possible to hold the flow path member body in the cover after curing the adhesive that adheres the flow path member bodies having a laminated structure to each other, but press the flow path body until the adhesive is cured. There is a problem that jigs to be used and time until the adhesive is cured are required, which increases the manufacturing cost.

Such a problem is not limited to the flow path member mounted on the ink jet recording head, and similarly exists in the flow path member mounted on another device.

In view of such circumstances, the present invention has an object to provide a flow path member, a liquid ejecting head, a liquid ejecting apparatus, and a manufacturing method of the flow path member that suppress the outflow and mixing of liquid due to destruction and reduce the cost. To do.

An aspect of the present invention that solves the above problem includes a cover that can be divided into a base part and a cover part, and a flow path member body that has a laminated structure in which a liquid flow path is formed. The cover portion is fixed by a fastening member across the flow path member main body, and at least one member of the cover and the flow path member main body is provided in a flow path forming region in which the flow path is formed. A first abutting portion protruding toward the other member, and a second abutting portion provided in a region closer to the fastening member than the first abutting portion, and the first abutting portion And the second abutting portion are the first abutting portion abuts against the other member before the base portion and the cover portion are fastened with the fastening member, and the second abutting portion is the other And the second member by fastening the fastening member. In the flow path member, wherein the distance between the contact portion and the other member is provided to be shorter.
In such an aspect, the flow path formation region of the flow path member main body is pressed by the first contact portion only by holding the flow path member main body in the cover. Generation | occurrence | production of malfunctions, such as leaking of a liquid and mixing of a different kind of liquid, can be suppressed by suppressing that a clearance gap generate | occur | produces. In addition, since each member constituting the flow path member main body can be held in the cover before the adhesive is cured, the jig for pressing the flow path member main body and the time for waiting for the adhesive to be cured are shortened. Thus, the manufacturing cost can be reduced.

Here, the fastening member is provided on a peripheral portion of the cover, and the first contact portion is
It is preferable that the cover is provided at the center of the cover. According to this, the cover can be reliably fixed by the fastening member.

Moreover, it is preferable that the said flow-path member main body has a laminated structure in which the some member was laminated | stacked through the adhesive agent. According to this, since each member which comprises a flow path member main body can also be hold | maintained in a cover before an adhesive hardens | cures, the time to wait for hardening of the jig | tool which presses a flow path member main body, or an adhesive agent The manufacturing cost can be reduced.

According to another aspect of the invention, there is provided a liquid ejecting head including the flow path member according to the above aspect.
In this aspect, liquid supply failure can be suppressed and reliability can be improved.

According to another aspect of the invention, there is provided a liquid ejecting apparatus including the flow path member according to the above aspect.
In this aspect, liquid supply failure can be suppressed and reliability can be improved.

Furthermore, another aspect of the present invention includes a cover that can be divided on the outer periphery, and a flow path member main body having a laminated structure in which a liquid flow path is formed inside the cover, and the cover is formed. Is
A flow path member manufacturing method comprising a base part and a cover part fixed to the base part, provided at least one of the cover and the flow path member body so as to protrude toward the other, After sandwiching the flow path member main body between the base part and the cover part in a state where the first contact part provided in the flow path forming region where the flow path is formed is in contact with the other, By fastening the base part and the cover part with a fastening member, the base part and the flow path member main body are provided so as to protrude toward the other and provided in a fastening region around the fastening member. The second contact part is brought into contact with the other to fix the base part and the cover part.
In such an aspect, the flow path formation region of the flow path member main body is pressed by the first contact portion only by holding the flow path member main body in the cover. Generation | occurrence | production of malfunctions, such as leaking of a liquid and mixing of a different kind of liquid, can be suppressed by suppressing that a clearance gap generate | occur | produces. In addition, since each member constituting the flow path member main body can be held in the cover before the adhesive is cured, the jig for pressing the flow path member main body and the time for waiting for the adhesive to be cured are shortened. Thus, the manufacturing cost can be reduced.

FIG. 3 is an exploded perspective view of the recording head according to the first embodiment. 3 is an exploded perspective view of a flow path member main body according to Embodiment 1. FIG. 3 is an exploded perspective view of a flow path member main body according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view of a main part of the recording head according to the first embodiment. FIG. 3 is a cross-sectional view of a main part of the recording head according to the first embodiment. FIG. 3 is an exploded perspective view of a main part of the back pressure control unit according to the first embodiment. FIG. 4 is a plan view and a cross-sectional view of a cover unit according to the first embodiment. 3 is a perspective view of a main part of a protective plate according to Embodiment 1. FIG. It is the figure which expanded the top view and principal part of the protection board which concern on Embodiment 1. FIG. FIG. 3 is a schematic cross-sectional view illustrating a method for manufacturing the back pressure control unit according to the first embodiment. It is a schematic sectional drawing which shows the manufacturing method of the back pressure control unit which concerns on a comparative example. 1 is a schematic perspective view of a recording apparatus according to Embodiment 1 of the present invention.

Hereinafter, the present invention will be described in detail based on embodiments.
(Embodiment 1)
FIG. 1 is an exploded perspective view of an ink jet recording head that is an example of a liquid jet head according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view from the first flow path member side of the flow path member main body. 3 is an exploded perspective view from the third flow path member side of the flow path member main body, FIGS. 4 and 5 are main part cross-sectional views of the recording head, and FIG. 6 is a back pressure control. FIG. 7 is an exploded perspective view of a main part of the unit, FIG. 7 is a plan view and a cross-sectional view of the cover part, FIG. 8 is a perspective view of a main part of the protection plate, and FIG. It is the figure which expanded the principal part.

As shown in FIG. 1, an ink jet recording head 10 that is an example of a liquid jet head according to Embodiment 1 of the present invention includes a back pressure control unit 20 that is a flow path member, and a back pressure control unit 2.
The circuit board 70 provided on the bottom surface of the head 0, the head case 80 provided on the opposite side of the circuit board 70 from the back pressure control unit 20, and the head main body 90 fixed to the head case 80 are provided.

The back pressure control unit 20 is a flow path member that supplies ink from liquid storage means such as an ink tank in which external ink is stored to the head main body 90.

Here, the back pressure control unit 20 will be described in detail. The back pressure control unit 20 includes a cover 30 made of a hollow box-shaped member, and a flow path member main body 40 provided inside the cover 30.
And.

The cover 30 includes a base portion 31 and a cover portion 32 that are divided vertically. The base portion 31 includes a first holding portion 311 having a concave shape that opens toward the cover portion 32, and a first holding portion 31.
The support part 31 provided with the wiring penetration hole 312 provided in the one end part side and penetrating in the thickness direction is provided.
3 is provided.

In addition, a plurality of supply ports 314 are provided on the bottom surface of the first holding portion 311 of the base portion 31 to supply ink to the head body through the thickness direction. In the present embodiment, the base portion 31
Seven supply ports 314 were provided on the bottom surface of the plate.

As shown in FIGS. 1 and 6, the cover portion 32 has a size that covers the first holding portion 311 of the base portion 31, and faces the first holding portion 311 of the base portion 31 so as to face the base portion 31. A second holding portion 321 having a concave shape opening in

As shown in FIGS. 4 and 5, the base portion 31 and the cover portion 32 include the first holding portion 3.
11 and the second holding portion 321 are fixed to each other so that the holding portion 33, which is a space defined by the first holding portion 311 and the second holding portion 321, is formed inside the cover portion 32. It is formed.

Here, as shown in FIGS. 4 to 6, the base portion 31 is provided with a first wall portion 315 that defines a side surface of the first holding portion 311. The cover portion 32 is provided with a second wall portion 322 that defines the side surface of the second holding portion 321. The base portion 31 and the cover portion 32 connect the distal end surface of the first wall portion 315 and the distal end surface of the second wall portion 322 to each other with the first seal portion 3.
4 is fixed in contact with each other. That is, the first seal portion 34 made of rubber or elastomer is sandwiched between the first wall portion 315 and the second wall portion 322. Of course, the first seal portion 34 may be heat-sealed or bonded using an adhesive. The base portion 31 and the cover portion 32 are fixed by inserting a fastening member 37 such as a screw shown in FIG. 1 from the base portion 31 side and screwing the fastening member 37 to the cover portion 32.

The cover portion 32 is provided with an opening 323 that communicates with the bottom surface of the second holding portion 321 and penetrates in the thickness direction. The opening 323 opens on the outer peripheral surface of the cover 32, and
A second wall portion 32 provided on the bottom surface of the second holding portion 321 and defining a side surface of the second holding portion 321.
An opening is provided in the protruding portion 324 protruding lower than 2.

As shown in FIGS. 2 to 5, the flow path member main body 40 held by the holding portion 33 of the cover 30 in this embodiment includes a first flow path member 41 provided on the cover 30 side, The second flow path member 42 provided on the base part 31 side of the first flow path member 41 and the third flow path member 43 provided on the base part 31 side of the second flow path member 42 are laminated. It is configured. That is, the flow path member main body 40 has a laminated structure. Further, the flow path member main body 40 is provided with a protective plate 44 on the cover portion 32 side of the first flow path member 41.

Each of the first flow path member 41, the second flow path member 42, the third flow path member 43, and the protection plate 44 is formed of a plate-like member made of a resin material, a metal material, or the like. The first flow path member 41, the second flow path member 42, the third flow path member 43, and the protection plate 44 are held in the holding portion 33 of the cover 30 in a stacked state. In the present embodiment, the first flow path member 4
1, the 2nd flow path member 42, the 3rd flow path member 43, the protection board 44, etc. are mutually adhere | attached with the adhesive agent.

In such a flow path member main body 40 constituted by the first flow path member 41, the second flow path member 42 and the third flow path member 43, the ink from the liquid storage means in which external ink is stored is headed. A liquid flow path for supplying the main body 90 is provided.

Specifically, as shown in FIGS. 4 and 5, the liquid channel is connected to the other end of a supply pipe (not shown) which is a tubular member such as a tube having one end connected to the liquid storage means. An introduction path 52 having a connection port 51, and a pressure adjustment chamber 53, which is a liquid chamber to which ink from the introduction path 52 is supplied.
An inlet 54 communicating with the pressure adjusting chamber 53, a filter chamber 56 communicating with the inlet 54 directly or via the communication channel 55, and a supply channel 57 for supplying ink in the filter chamber 56 to the head main body 90. Are provided.

Here, the connection port 51 is provided on the upper surface of the second flow path member 42 so as to open into the opening 323 of the cover portion 32. A plurality of such connection ports 51 are provided corresponding to a plurality of inks. In the present embodiment, seven connection ports 51 are provided (see FIGS. 1 and 2).

The introduction path 52 having such a connection port 51 is formed between the second flow path member 42 and the first flow path member 41, or between the second flow path member 42 and the first flow path member 41. Channel and first channel member 4
1 and a base 31 and the like.

Specifically, the introduction path 52 of the present embodiment includes two paths, a first introduction path 521 shown in FIG. 4 and a second introduction path 522 shown in FIG.

As shown in FIG. 4, the first introduction channel 521 includes a first introduction channel 521 a that penetrates the second channel member 42 and the third channel member 43 in the thickness direction, and a third channel member 43. A second introduction channel 521b formed in a concave shape on the bottom and having one end communicating with the first introduction channel 521a;
A third introduction flow path 521c that communicates with the other end of 1b and is provided through the third flow path member 43.
An introduction filter chamber 521d that is provided between the third flow path member 43 and the second flow path member 42 and communicates with the third introduction flow path 521c, and a second flow that communicates with the introduction filter chamber 521d. And a fourth introduction channel 521e provided through the path member 42.

As shown in FIG. 5, the second introduction path 522 communicates with the connection port 51, penetrates the second flow path member 42 in the thickness direction, the fifth introduction flow path 522 a, the second flow path member 42, A third introduction channel 522b having a concave shape provided between the three channel members 43, an introduction filter chamber 522c communicating with the sixth introduction channel 522b, and a communication channel with the introduction filter chamber 522c. 2 channel member 4
And a seventh introduction flow path 522d provided so as to penetrate 2 in the thickness direction.

That is, the first introduction path 521 passes through the second introduction flow path 521 b between the third flow path member 43 and the base portion 31 and reaches the pressure adjustment chamber 53. On the other hand, the second introduction path 522 is third.
Without passing between the flow path member 43 and the base portion 31, it passes through the sixth introduction flow path 522 b between the second flow path member 42 and the third flow path member 43 and enters the pressure adjustment chamber 53. Reach.

In addition, in the introduction filter chambers 521d and 522c provided in the middle of each of the first introduction path 521 and the second introduction path 522, an introduction filter 58 for removing foreign matters such as dust and bubbles contained in the ink is provided. Is provided.

Here, the introduction filter chamber 521d in the middle of the first introduction path 521 has a third introduction passage 5.
21c and the fourth introduction flow path 521e are the introduction filter 5 of the introduction filter chamber 521d.
8 are communicated with both sides of each other. Thus, the ink supplied from the third introduction flow path 521c passes through the introduction filter 58 and is supplied to the fourth introduction flow path 521e.

Similarly, the introduction filter chamber 522c provided in the middle of the second introduction path 522 includes the sixth
The introduction channel 522b and the seventh introduction channel 522d communicate with both sides of the introduction filter 58, respectively. As a result, the ink supplied from the sixth introduction channel 522b passes through the introduction filter 58 and is supplied to the seventh introduction channel 522d.

Incidentally, in this embodiment, as shown in FIGS. 2 and 3, seven connection ports 51 are provided, and seven introduction paths 52 are provided corresponding to the seven connection ports 51. Of the seven introduction paths 52,
Four first introduction paths 521 and three second introduction paths 522 are provided.

Thus, the 1st introduction channel 5 constituted by the 1st introduction channel 521a-the 4th introduction channel 521e.
21 and the second introduction path 522 constituted by the fifth introduction flow path 522a to the seventh introduction flow path 522d, the ink flows downward in FIG. 4 and FIG. A second introduction flow path 521b and a sixth introduction flow path 522b used for connection from the flowing introduction path 52 to the introduction path 52 through which ink flows upward in the figure are provided between the third flow path member 43 and the base portion 31. The second
They can be arranged at different positions between the flow path member 42 and the third flow path member 43. Thereby, since the area which provides the 2nd introduction flow path 521b and the 6th introduction flow path 522b can be narrowed, the flow path member main body 40 can be reduced in size and the back pressure control unit 20 can be reduced in size. Each introduction path 52 communicates with each pressure adjustment chamber 53 provided in the first flow path member 41.

The pressure adjusting chamber 53 has a concave shape that opens to the opposite side of the first flow path member 41 that is a plate-like member from the second flow path member 42. Further, the pressure adjusting chamber 53 communicates with the introduction path 52 at the bottom surface on one end side in the direction orthogonal to the juxtaposed direction, and communicates with the filter chamber 56 via the inflow port 54 provided on the bottom surface on the other end side. is doing.

Such a pressure adjustment chamber 53 is formed on the film member 4 provided on the opening surface of the first flow path member 41.
5 is sealed. Here, the film member 45 is a thin film having flexibility, and is fixed to the surface of the first flow path member 41 by heat welding or the like. The film member 45 is press-molded so as to be bent into a dome shape in the pressure adjusting chamber 53.

Further, an elastic plate 46 disposed on the film member 45 side is provided in the pressure adjustment chamber 53 of the first flow path member 41. The elastic plate 46 is provided so as to protrude into the pressure adjustment chamber 53 in a state where one end portion side is fixed to the surface side of the first flow path member 41, and the tip thereof is provided in the pressure adjustment chamber 53.
Within the free end. In this embodiment, as shown in FIGS. 2 and 3, the elastic plate 46 is divided by a common portion 46 a where the plurality of elastic plates 46 are common on the fixed end side and a slit 46 b protruding into the pressure adjustment chamber 53. It has what is called a comb-tooth shape comprised by the elastic part 46c.

Such an elastic plate 46 is fixed by the common portion 46 a being held on the opening surface side of the pressure adjusting chamber 53. The elastic plate 46 may be a plate-like member having elasticity and ink resistance. In this embodiment, a stainless plate is used.

As shown in FIGS. 4 and 5, the filter chamber 56 is provided through the second flow path member 42 in the thickness direction. Here, the filter chamber 56 includes a plurality of first filter chambers 561 arranged in parallel in the first row and a plurality of second filter chambers 562 arranged in parallel in the second row.

That is, as shown in FIGS. 2 and 3, the first filter chambers 561 are arranged side by side in the first direction X, which is the direction in which the pressure adjustment chambers 53 are arranged, and constitute a first row.

Similarly, the second filter chambers 562 are arranged side by side in the first direction X, which is the direction in which the pressure adjustment chambers 53 are arranged, and constitute a second row. The first row of the first filter chambers 561 and the second row of the second filter chambers 562 are arranged in a second direction Y that is a direction orthogonal to the first direction X.

In the present embodiment, four first filter chambers 561 are provided in a region facing the inlet 54,
Three second filter chambers 562 are provided on the introduction path 52 side in the second direction Y from the inlet 54.

The first filter chamber 561 and the second filter chamber 562 are formed such that the opening on the first flow path member 41 side is rectangular. The first filter chambers 561 are arranged side by side so that the surface direction of the short side of the opening is the first direction X. On the other hand, the second filter chamber 562 is arranged so as to be rotated about 90 degrees with respect to the first filter chamber 561, that is, arranged in parallel so that the surface direction of the long side of the opening is the first direction X. .

Further, as shown in FIGS. 2 and 5, a communication channel 55 that opens to the first channel member 41 side is disposed between the first filter chambers 561 adjacent to each other in the first direction X of the second channel member 42. Is provided. The communication flow path 55 is provided in a concave shape that opens on the surface of the second flow path member 42 on the first flow path member 41 side, and one end portion is provided in a region facing the inflow port 54. 54,
The other end communicates with the second filter chamber 562.

Here, as shown in FIG. 3, the inflow port 54 is arranged in the direction in which the pressure regulation chambers 53 are arranged (first direction X).
Are arranged in a row. This is because if the inlet 54 is provided at a different position, the control pressure for operating the valve body 100 described later varies, the ink supply characteristics vary, and the ejection characteristics of the ink droplets ejected from the head body 90 are reduced. This is because variations occur.

Such in-line inlets 54 are arranged in the first filter chamber 561 and the second filter chamber 5.
62 communicates alternately. Specifically, every other inlet 54 has a first filter chamber 561.
Open directly into. In addition, the inlet 54 that does not communicate with the first filter chamber 561 has the first direction X
In opposition to the partition between the adjacent first filter chambers 561, the first filter chamber 561 communicates with the second filter chamber 562 through a communication channel 55 provided in the partition. In the present embodiment, as described above, four first filter chambers 561 are provided, three second filter chambers 562 are provided, and three communication channels 55 are provided between the four first filter chambers 561. did. Thus, the communication channel 5
5 is provided between the first filter chambers 561, the number of communication channels 55 is preferably one or more less than the number of first filter chambers 561. For this reason, the second corresponding to the communication channel 55.
It is preferable that the number of filter chambers 562 be one or more less than the number of first filter chambers 561. Of course, four first filter chambers 561 are provided, and the second filter chamber 562 is provided.
One or two of them may be provided. However, in order to arrange the largest number of filter chambers 56 in a limited space, it is preferable to provide the second filter chambers 562 by a number one less than the number of first filter chambers 561.

In the present embodiment, the first filter chamber 561 is arranged so that the surface direction of the short side opening to the first flow path member 41 side is the first direction X, and the second filter chamber 562 is set to the long side of the opening. Are arranged so that the surface direction is the first direction X. This is also possible because the second filter chambers 562 are provided in a smaller number than the first filter chambers 561. And by arranging the second filter chamber 562 so that the surface direction of the long side of the opening is the first direction X in this way, the flow path member body 40 is not enlarged in the second direction Y, It can be reduced in the two directions Y. That is, when the second filter chamber 562 is disposed at the same rotational position as the first filter chamber 561, the surface direction of the long side of the opening of both the first filter chamber 561 and the second filter chamber 562 is the second direction Y. This is because the size increases in the second direction Y. However,
When the same number of second filter chambers 562 as the first filter chambers 561 are provided, the first filter chambers 561 and the second filter chambers 562 are arranged in the same rotational direction, so that the first
An increase in size in the direction X can be suppressed.

As described above, the first filter chamber 5 that directly communicates with the inflow port 54 as the filter chamber 56.
61 and the second filter chamber 562 communicating with the inflow port 54 via the communication channel 55 can maximize the opening area of the filter chamber 56 without increasing the size of the channel member main body 40. The maximum volume can be secured.

The filter chamber 56 constituted by the first filter chamber 561 and the second filter chamber 562 is provided so as to penetrate the second flow path member 42 in the thickness direction, and the opening surface thereof is the first flow chamber. Covered by the path member 41 and the third flow path member 43. And each filter chamber 5
6 is supplied to the head main body 90 (head case 80) via the supply path 57.

The supply path 57 communicates with the filter chamber 56 and passes through the third flow path member 43 in the thickness direction, and is provided between the third flow path member 43 and the base portion 31. Second provided
A supply path 572. In addition, the first channel communicating with the filter chamber 56 of the second flow path member 42 is provided.
The opening of the supply path 571 is a widened filter holding portion 573. The filter holding portion 573 is provided with a supply filter 59 for removing foreign matters such as dust and bubbles contained in the ink. Yes. Then, the ink from the pressure adjusting chamber 53 is supplied to the filter chamber 56 through the inflow port 54, and the ink in the filter chamber 56 is supplied to the filter holding unit 5.
The first supply path 571 and the second supply path 57 pass through the supply filter 59 provided in 73.
2 is supplied to the supply port 314 through the supply port 314 and supplied from the supply port 314 to the head main body 90.

The second supply path 572 is defined by a concave portion provided on the surface of the third flow path member 43 on the base portion 31 side and a concave portion provided on the surface of the base portion 31 on the third flow passage member 43 side. It is made. The supply ports 314 that communicate with the supply path 57 and supply the ink to the head main body 90 are provided in a line along the first direction X. In the present embodiment, as shown in FIG. 1, the supply ports 314 are arranged in two rows in the second direction Y. The supply ports 314 are arranged in a row along the first direction X. The two supply ports 314 provided side by side in the direction Y form a set and are provided in a line along the first direction X. A set of two supply ports 314 arranged in the second direction Y is connected to one head body 90.

Here, for example, when the plurality of head main bodies 90 are held by the back pressure control unit 20 via the head case 80, the intervals and positions of the two supply ports 314 that are one set are provided differently for each set. The opening position of the flow path connected to the supply port 314 on the head main body 90 side must be shifted for each set, and the flow path structure inside the head main body 90 becomes complicated, which increases the manufacturing cost. I will invite you. In the present embodiment, the two supply ports 314 provided at the same interval and at the same position in the second direction Y are arranged in a line in the first direction X, so that each set has the same shape (opening of the channel). The head body 90 can be used at the same position)
The flow path structure inside the head body 90 can be simplified. Therefore, the manufacturing cost of the head main body 90 can be reduced, and the assembly process can be simplified.

As described above, the pressure regulation chamber 53 needs to be provided with the same volume, and there is a restriction that the inlet 54 needs to be provided at the same position of each pressure regulation chamber 53. Further, the supply port 314 connected to the head body 90 is also restricted in the position where it is connected to the head body 90. However, in the present embodiment, the filter chamber 56 is configured by a first filter chamber 561 that directly communicates with the inflow port 54 and a second filter chamber 562 that communicates with the inflow port 54 via the communication channel 55. The filter chamber 56 can be provided between the inlet 54 and the supply port 314 whose positions are regulated without increasing the size of the back pressure control unit 20 so that the supply filter 59 has a maximum area. At the same time, the maximum volume can be secured.

The protective plate 44 that seals the pressure regulation chamber 53 of the first flow path member 41 is the first flow path member 41.
The film holding part 60 which has a concave shape which is a space which opposes each pressure regulation chamber 53 and accept | permits a deformation | transformation of the film member 45 is provided in the surface of the side.

Further, the back pressure control unit 20 is provided with an air release path 61 that opens the atmosphere of the film holding unit 60 to the outside and communicates with the outside.

  Here, the atmosphere opening path 61 will be described in detail with reference to FIGS.

The air release path 61 is provided on the surface opposite to the first flow path member 41 of the protective plate 44 and the through hole 611 penetrating in the thickness direction opening on the bottom surface of the film holding portion 60 of the protective plate 44. The first narrow path 612 is provided on the same surface as the first narrow path 612 and the first narrow path 612 of the protection plate 44.
12, a second narrow path 613 that communicates with 12, a serpentine path 614 that communicates with the second narrow path 613, and an external communication hole 615 (see FIG. 1) provided in the cover portion 32.

As shown in FIGS. 8 and 9, the first narrow path 612 has a concave shape provided on the surface of the protective plate 44 opposite to the first flow path member 41 so as to correspond to each film holding portion 60. 1st groove part 6 which has
12a and the convex part 612b which has the convex shape provided corresponding to the 1st groove part 612a of the cover part 32 shown in FIG. And the film holding part 60 and the 1st narrow path 612 are connected by the through-hole 611 provided in the one end part of the 2nd direction Y of the pressure regulation chamber 53. FIG.

As shown in FIGS. 8 and 9, the second narrow path 613 has a concave shape provided between the first groove portions 612 a that define the first narrow path 612. Further, the opening on the cover portion 32 side of the second narrow path 613 is sealed by the convex portion 612b. Also, the first narrow road 612,
The second narrow path 613 communicates with the through hole 611 at the end opposite to the longitudinal direction. Specifically, the convex portion 612 b is provided with an opening 612 c that opens on the side surface of the first narrow path 612 on the side opposite to the through hole 611. Moreover, the convex part 612b seals other than the both ends of the second narrow path 613. Accordingly, the first narrow path 612 and the second narrow path 613 communicate with each other on the side opposite to the through hole 611 through the opening 612c.

Such first narrow path 612 and second narrow path 613 are provided so as to reciprocate in the second direction Y.

8 and 9, the protective plate 44 has a concave shape meandering in the first direction X while reciprocating in the second direction Y on the opposite side of the opening 612c of the convex portion 612b. A serpentine 614 which is a groove having The serpentine path 614 has one end communicating with the second narrow path 613 and the other end communicating with the cover section 32 in the thickness direction through an external communication hole 615 (FIG. 1).
Communication). That is, as shown in FIGS. 4 and 5, the film holding portion 60 that defines the space on the opposite side of the film member 45 from the pressure adjustment chamber 53 includes a through hole 611, a first narrow path 612, and a second narrow width. An open air path 61 comprising a side road 613, a serpentine 614, and an external communication hole 615.
Communicates with the outside. As described above, the film holding unit 60 on the opposite side of the film member 45 from the pressure adjustment chamber 53 is opened to the atmosphere by the atmosphere release path 61, so that the pressure adjustment chamber 53 is opened.
The film member 45 can be deformed by the differential pressure between the internal pressure and the atmospheric pressure.

Further, the air opening path 61 is connected to the through hole 611, the first narrow path 612, the second narrow path 613,
By comprising the meandering path 614 and the external communication hole 615, the atmosphere opening path 61 can be formed long with a narrow cross-sectional area. Thereby, diffusion resistance can be given to the atmosphere opening path 61 and moisture evaporation from the film member 45 can be suppressed. Incidentally, the moisture of the ink filled in the pressure adjusting chamber 53 permeates the film member 45. Therefore, if an air release path not provided with diffusion resistance is provided, the moisture of the ink that has permeated the film member 45 is likely to evaporate. As a result, problems such as an increase in ink viscosity occur. In the present embodiment, the evaporation of moisture in the ink that passes through the film member 45 can be suppressed, so that it is possible to suppress the occurrence of problems such as an increase in the viscosity of the ink.

Moreover, in this embodiment, the convex part 612b provided in the cover part 32 is a 1st contact part. That is, the first abutting portion is provided on at least one member of the cover 30 in the flow path formation region and the flow path member main body 40, is provided so as to protrude toward the other member, and contacts the other member. It touches. The first contact portion of the present embodiment is a cover portion 3 that is one member.
The protrusion 612b is provided on the second side, protrudes toward the flow path member main body 40, which is the other member, and comes into contact with the flow path member main body 40, which is the other member.

Further, as shown in FIG. 1, the base portion 31 is provided with fastening through holes 316 that are provided on the four corners of the holding portion 33 (first holding portion 311) and penetrate in the thickness direction. . As shown in FIGS. 6 and 7, the cover portion 32 is provided with a boss 326 provided with a fixing hole 325 communicating with the fastening through-hole 316 on the four corners of the second holding portion 321. Yes.

The base portion 31 and the cover portion 32 are integrated by screwing the tip of a fastening member 37 (see FIG. 1) such as a screw inserted into the fastening through hole 316 of the base portion 31 into the fixing hole 325. Fixed in state.

In the region closer to the fastening member 37 than the flow path forming region of the cover portion 32, as shown in FIGS. 6 and 7, a second contact portion 327 protruding toward the flow channel member main body 40 is provided. Is provided. In the present embodiment, the second contact portion 327 is provided around the boss on the inner surface of the cover portion 32. That is, the second contact portion 327 is provided on at least one member of the cover 30 and the flow path member main body 40 in the fastening region, is provided to protrude toward the other member, and contacts the other member. Is. In addition, a flow path formation area | region is an area | region in which the flow path of the flow path member main body 40 was formed, and the area | region of the cover 30 facing this. Then, the second contact portion 327
The area closer to the fastening member 37 than the flow path forming area provided with is the area between the fastening member 37 and the flow path forming area (convex portion 612b).

And the convex part 612b which is a 1st contact part, and the 2nd contact part 327, before fastening the base part 31 and the said cover part 32 with the fastening member 37, the convex part 612b which is a 1st contact part. By abutting the flow path member main body 40 which is the other member, the second contact portion 327 has a gap with the flow path member main body 40 being the other member, and fastening the fastening member 37 The distance between the second contact part 327 and the flow path member main body 40 is shortened.

Specifically, in the present embodiment, the convex portion 612 b that is the first contact portion is provided with a higher protrusion amount than the second contact portion 327. Thereby, when the flow path member main body 40 is held in the cover 30, the convex portion 612b comes into contact with the flow path member main body 40 first in the flow path formation region, and then the fastening member 37 is fastened. The second contact portion 327 contacts the flow path member main body 40.
Therefore, the flow path forming region of the flow path member main body 40 can be reliably pressed by the cover 30.

In the present embodiment, the convex portion 612b is provided with a protruding amount higher than the protruding amount of the second abutting portion 327, but this is a flow path in which the convex portion 612b and the second abutting portion 327 abut. This is possible because the member main body 40 abuts on the same height surface. That is, when the height of the contact area of the flow path member main body 40 where the convex portion 612b and the second contact portion 327 are in contact with each other is different, as described above, the convex portion 612b that is the first contact portion. And the second abutting portion 327 before the base portion 31 and the cover portion 32 are fastened by the fastening member 37, the convex portion 612b as the first abutting portion is formed on the flow path member body 40 as the other member. The second abutting portion 32 comes into contact with the second abutting portion 327 by having a gap between the second abutting portion 327 and the flow path member main body 40 as the other member and fastening the fastening member 37.
7 and the flow path member main body 40 should just be provided so that the distance may become short. Of course, the first contact portion and the second contact portion may be provided on the flow path member main body 40 side, and the first contact portion and the second contact portion are provided on both the cover portion 32 and the flow path member main body 40. A portion may be provided.

Further, as shown in FIGS. 4 to 7, the first seal portion 34, the second seal portion 35, and the third seal portion 36 made of rubber, elastomer, etc. are separated from each other in such a cover portion 32. Is provided.

As described above, the first seal portion 34 is provided over the distal end surface of the second wall portion 322 of the cover portion 32, and the seam of the outer periphery between the base portion 31 and the cover portion 32 is formed by the first seal portion 34. Sealing is performed to prevent the ink in the holding portion 33 of the cover 30 from flowing out.

The second seal part 35 is provided at a position opposite to the meandering path 614 (see FIG. 4) of the cover part 32 and seals the opening of the meandering path 614 on the cover part 32 side. As shown in FIG. 6, the second seal portion 35 has a communication hole 35 that communicates with the external communication hole 615 of the atmosphere opening path 61.
a is provided, and the second seal portion 35 actually seals the region other than the communication hole 35 a of the meander 614.

The third seal portion 36 is provided over the periphery of the opening 323 on the surface of the protrusion 324 provided with the opening 323 described above on the protective plate 44 side. The third seal portion 36 is
This is for sealing the gap with the cover portion 32 around the connection port 51 of the flow path member main body 40. By fixing to the opening 323 by the third seal portion 36, it is possible to prevent ink leaking when the supply pipe connected to the connection port 51 is attached or detached from flowing into the holding portion 33. At the same time, the ink in the holding part 33 can be prevented from leaking from the gap with the cover part 32 around the connection port 51.

The first seal portion 34, the second seal portion 35, and the third seal portion 36 as described above are provided as the cover portion 32.
Are provided at different positions. Specifically, the first seal portion 34 is provided on the distal end surface of the second wall portion 322 of the cover portion 32 as described above. The second seal portion 3
5 is provided on the bottom surface of the second holding portion 321 of the cover portion 32 (the surface opposite to the protection plate 44). Further, the third seal portion 36 is provided on the distal end surface of the protruding portion 324 that protrudes lower than the second wall portion 322 of the cover portion 32. Therefore, the first seal portion 34, the second seal portion 35, and the third seal portion 36 are provided at positions where the height of the cover portion 32 is different. Here, the height of the cover portion 32 refers to the thickness direction in the stacking direction of the base portion 31 and the cover portion 32. Accordingly, the first seal portion 34, the second seal portion 35, and the third seal portion 36 are used.
Are provided at different positions in the stacking direction of the cover portion 32.

In addition, the height of the second wall portion 322 of the cover portion 32 is set to the same height as the bottom surface of the cover portion 32 provided with the second seal portion 35 and the projection portion 324 provided with the third seal portion 36. It is difficult. For example, if the height of the second wall portion 322 is the same as the bottom surface of the cover portion 32 provided with the second seal portion 35, the second holding portion 321 can be sufficiently secured. It is not possible. Further, in order to secure the holding portion 33, the first holding portion 31 of the base portion 31.
Even if the first wall portion 315 defining 1 is raised, the bottom surface of the base portion 31 (head body side)
The region for screwing the fastening member 37 inserted through the cover portion 32 into the cover portion 32 becomes insufficient, and the base portion 3
It is because it becomes difficult to fix 1 and the cover part 32 reliably. Further, for example, if the height of the second wall portion 322 is set to the same height as the protrusion 324 provided with the third seal portion 36, the third seal portion 36 and the second seal portion 35 are close to each other. There is a problem that ink leaking from the connection port 51 is likely to leak to the outside via the third seal portion 36 and the second seal portion 35. If the height of the protrusion 324 is the same as the height of the second wall 322, the position of the connection port 51 must be changed on the flow channel member main body 40 side. However, there is a problem that the area for providing is increased and the size is increased.

In the present embodiment, by providing the first seal portion 34, the second seal portion 35, and the third seal portion 36 at positions where the height of the cover portion 32 is different, the second holding portion 321 is sufficiently secured, The base portion 31 and the cover portion 32 can be firmly fixed, and the first seal portion 34 and the third seal portion 36 are separated from each other to make it difficult for the ink in the holding portion 33 to leak to the outside. Can do. Further, since the first seal portion 34, the second seal portion 35, and the third seal portion 36 can be provided at positions where the height of the cover portion 32 is different, the cover 30 of the back pressure control unit 20 is provided.
, The connection port 51 and the serpentine 614 can be provided at different heights, and the design freedom is high and the size can be reduced.

The first seal portion 34, the second seal portion 35, and the third seal portion 36 are integrally formed with the cover portion 32 by two-color molding. In this embodiment, after forming the cover part 32 by shape | molding a resin material, both were integrally formed by shape | molding a rubber material in the predetermined position of the cover part 32. FIG.

Thus, the cover part 32, the 1st seal part 34, the 2nd seal part 35, and the 3rd seal part 36 are integrally formed by two-color molding, so that the first seal part 34 and the second seal part are formed. 3
The positioning of the fifth and third seal portions 36 is not necessary, and the assembling work of the back pressure control unit 20 can be simplified and the cost can be reduced. In particular, as in the present embodiment, when the first seal portion 34, the second seal portion 35, and the third seal portion 36 are provided at positions where the height of the cover portion 32 is different, positioning work is not required and assembly is performed. Work can be simplified,
The occurrence of ink leakage due to the displacement of the first seal portion 34, the second seal portion 35, and the third seal portion 36 can be suppressed.

Further, when the plate-like seal member which is a separate body is used by integrally forming the cover portion 32, the first seal portion 34, the second seal portion 35, and the third seal portion 36 by two-color molding. Compared to the above, the number of parts can be reduced, and the manufacturing cost and assembly cost can be reduced.

Here, the manufacturing method which manufactures the back pressure control unit 20 which is such a flow path member is demonstrated concretely. FIG. 10 is a schematic cross-sectional view illustrating a method for manufacturing the back pressure control unit according to the first embodiment of the present invention, and FIG. 11 illustrates the manufacture of a comparative example of the back pressure control unit according to the first embodiment of the present invention. It is a schematic sectional drawing which shows a method.

First, as shown in FIG. 10A, the flow path member main body 40 is held between the base portion 31 and the cover portion 32. At this time, an adhesive 47 is applied between the first flow path member 41, the second flow path member 42, the third flow path member 43, the protection plate 44, and the like constituting the flow path member main body 40. Also,
The adhesive 47 that bonds the members of the flow path member main body 40 at this time may be in an uncured state.

Thus, when the flow path member main body 40 is held between the base portion 31 and the cover portion 32,
Since the convex portion 612b which is the first contact portion of the cover portion is provided higher than the second contact portion 327 (the amount of protrusion is large), the convex portion 612b contacts the flow path member main body 40 first. Touch.

Next, as shown in FIG. 10B, the back pressure control unit 20 is formed by screwing the tip of a fastening member 37 such as a screw inserted into the fastening through hole 316 of the base portion 31 into the fixing hole 325. To do. At this time, by the fastening of the fastening member 37, the convex portion 612 b that has been in contact with the pressure presses the flow path forming region of the flow path member main body 40. And the 2nd contact part 327 contact | abuts with the flow-path member main body 40 because the cover part 32 deform | transforms. That is, in the flow path member main body 40, the convex portion 612b that is the first contact portion comes into contact with the flow path formation region first, and then the second contact portion 327 comes into contact with the fastening region. Therefore, when the second contact portion 327 is brought into contact with the flow path member main body 40, the convex portion 61 is provided.
The flow path member main body 40 is pressed by 2b in a direction in which the members abut against each other. Since the adhesive 47 is cured in such a state, it is possible to suppress the occurrence of gaps between the members constituting the flow path member main body 40 and to cause problems such as ink leakage and mixing of different types of ink. Generation | occurrence | production can be suppressed. Further, since the members of the flow path member main body 40 can be pressed in the direction in which they are brought into contact with each other simply by assembling the back pressure control unit 20, when the flow path member main body 40 is held in the cover 30, Adhesive 47 for each member constituting the road member body 40
Can be in an uncured state. That is, since it is not necessary to hold each member constituting the flow path member main body 40 with a jig or the like until the adhesive 47 is cured and then incorporate it into the cover 30, there is no need to wait for the jig or curing. Cost can be reduced.

On the other hand, for example, as shown in FIG. 11A, when the second contact portion 327 is formed higher than the convex portion 612b which is the first contact portion, Second contact portion 32
7 contacts first. As shown in FIG. 11B, even if the fastening member 37 is fastened, since the second contact portion 327 is in contact with the fastening region, the convex portion 612 that is the first contact portion.
b does not contact the flow path member main body 40, and a gap is formed between the flow path formation region of the flow path member main body 40 and the cover portion 32, and the flow path formation region of the flow path member main body 40 Is not pressed. Thereby, the pressing of the flow path forming region of the flow path member main body 40 by the cover 30 becomes insufficient,
Problems such as ink leakage and mixing of different types of ink are likely to occur. Further, in the structure shown in FIG. 11, the adhesive 47 that bonds the members constituting the flow path member main body 40 must be cured and held in the cover 30, and the flow path member main body 40 is bonded. It takes time to wait for the jig to press and the curing of the adhesive 47 to increase the manufacturing cost.

In addition, even if it manufactures so that the convex part 612b and the 2nd contact part 327 may become the same height, it is also considered that the 2nd contact part 327 becomes higher by the manufacture dispersion | variation in a product. In particular, when each member is manufactured by inexpensive molding, product variation becomes relatively large, and therefore the second contact portion 327 may be higher than the convex portion 612b that is the first contact portion. is there. For this reason, it is preferable that the difference between the protruding amount (height) of the convex portion 612b and the protruding amount (height) of the second contact portion 327 is larger than the tolerance. Thereby, the convex part 612b can be reliably made higher than the second contact part 327, and the convex part 612b can be brought into contact with the flow path member main body 40 first.

Further, as shown in FIGS. 4 and 5, a valve body 100 is provided between the introduction path 52 and the pressure adjustment chamber 53 to open and close the communication state between them.

Specifically, on the bottom surface of the third flow path member 43, a cylindrical case portion 101 that extends vertically in the introduction path 52 (the fourth introduction flow path 521e and the seventh introduction flow path 522d) is formed. . The lower surface of the case portion 101 is in contact with the bottom surfaces of the fourth introduction channel 521e and the seventh introduction channel 522d. Further, the inside of the case portion 101 communicates with the pressure adjustment chamber 53, and the case portion 101
A slit 102 that communicates the inside and outside of the case portion 101 is provided on the side surface. Thereby, the pressure regulation chamber 53 and the introduction path 52 communicate with each other through the inside of the case portion 101.

A valve body 100 is provided in the case portion 101. The valve body 100 is provided at a lower end portion of the shaft portion 104 in the case portion 101 and a columnar shaft portion 104 that is inserted into an insertion hole 103 that communicates the inside of the case portion 101 and the pressure adjustment chamber 53. A disc-shaped flange 105 having an outer diameter larger than the outer diameter of the shaft portion 104. The lower end of the shaft part 104 is the collar part 1
The upper end of the shaft 104 is in contact with the lower surface of the elastic plate 46 (the surface on the pressure adjustment chamber 53 side).

The outer diameter of the flange portion 105 is larger than the inner diameter of the insertion hole 103 and slightly smaller than the inner diameter of the case portion 101. Further, a coil spring 106, which is an example of an urging member, is provided between the lower surface of the flange portion 105 (the surface on the second flow path member 42 side) and the bottom surfaces of the fourth introduction flow path 521e and the seventh introduction flow path 522d. It is intervened.

The coil spring 106 biases the valve body 100 upward (in the film member 45 side), which is the direction in which the valve body 100 is always closed. When the valve body 100 is in the closed state, the flange portion 105 is in close contact with the upper wall surface in the case portion 101 and the insertion hole 103 is closed, that is, the inside of the case portion 101 and the introduction path 52 communicate with each other. There is no out of communication.

When the inside of the pressure adjustment chamber 53 becomes negative due to the supply of ink to the head body 90,
The film member 45 is displaced so as to bend toward the pressure adjusting chamber 53 side (second flow path member 42 side) due to the differential pressure from the atmospheric pressure inside the film holding unit 60. Along with the displacement of the film member 45,
The elastic portion 46c (see FIG. 6) of the elastic plate 46 is elastically deformed so as to bend toward the second flow path member 42 side.

Due to the elastic deformation of the elastic plate 46, the shaft portion 104 depresses the valve body 100 toward the second flow path member 42 against the urging force of the coil spring 106, so that the wall portion 105 opens the insertion hole 103. The pressure adjusting chamber 53 and the introduction path 52 communicate with each other.

As described above, when the pressure adjustment chamber 53 and the introduction path 52 communicate with each other, the ink in the introduction path 52 flows into the pressure adjustment chamber 53. When the pressure adjustment chamber 53 and the supply path 57 are sufficiently filled with ink, the negative pressure in the pressure adjustment chamber 53 is eliminated, and the elastic plate 46 returns to the original state.
Each valve element 100 is closed by the urging force of each coil spring 106, whereby each pressure adjustment chamber 53 is always kept at a constant pressure.

On the bottom surface of the base portion 31 of the back pressure control unit 20, as shown in FIGS. 4 and 5, a head case 80 that holds the circuit board 70 between the base portion 31 and the head case 8.
And a head main body 90 provided on the bottom surface of zero.

The head case 80 has substantially the same area as the base portion 31, is fixed to the bottom surface of the base portion 31, and holds the circuit board 70 with the base portion 31.

The circuit board 70 is arranged so that the connector to which the external wiring is connected faces upward in a region opposite to the wiring insertion hole 312. Such a circuit board 70 includes a plurality of head main bodies 90.
A common connection can be used.

Although not particularly shown, the head main body 90 is provided with two or more rows in which nozzle openings are arranged in parallel, and is provided so that various inks supplied from the back pressure control units 20 can be discharged from each nozzle row. . In the present embodiment, although not particularly illustrated, four head bodies 90 are provided,
Two color inks are ejected from the three head main bodies 90, and one color ink is ejected from two nozzle arrays from one head main body 90. As a result, 7
Color ink can be ejected. The number and arrangement of the head main bodies 90 are not particularly limited to this, and for example, the same number of head main bodies 90 as the supply paths 57 may be provided.

The head main body 90 is provided with a pressure generating chamber communicating with the nozzle opening and a pressure generating means for causing a pressure change in the pressure generating chamber, although not particularly shown. As such pressure generating means, for example, a pressure change chamber is generated by changing the volume of the pressure generating chamber by deformation of a piezoelectric actuator having a piezoelectric material exhibiting an electromechanical conversion function, and an ink droplet is ejected from a nozzle opening. A heat generating element is placed in the pressure generating chamber, and ink droplets are ejected from the nozzle opening by bubbles generated by the heat generated by the heat generating element, or static electricity is generated between the diaphragm and the electrode and vibrated by electrostatic force. A so-called electrostatic actuator that deforms the plate and ejects ink droplets from the nozzle openings can be used.

As described above, in the present embodiment, as the contact portion where the cover 30 and the flow path member main body 40 come into contact, the convex portion 612b which is the first contact portion that contacts in the flow path forming region, and the fastening member 37. And a second abutting portion 327 that abuts in the fastening region around the projection portion 612b so that the protruding amount of the convex portion 612b is larger (higher) than the protruding amount of the second abutting portion 327. For this reason, when the flow path member main body 40 is held in the cover 30, the convex portion 612 b comes into contact first, and the cover 30 reliably presses the flow path formation region of the flow path member main body 40, thereby causing the flow. It is possible to suppress the occurrence of problems such as ink leakage and mixing of different types of ink due to insufficient pressing of the path formation region. Moreover, since the flow path formation region of the flow path member main body 40 can be pressed only by being incorporated in the cover 30, the adhesive that bonds the members constituting the flow path member main body 40 is in an uncured state. Also, the back pressure control unit 20 can be assembled. That is, by assembling the back pressure control unit 20, the cover 30 functions as a jig that presses each member of the flow path member main body 40 in a direction to contact each other, so that the adhesive is cured in a commercialized state. This eliminates the need for a separate jig and eliminates the need to wait for curing, thereby reducing the manufacturing cost.

(Other embodiments)
As mentioned above, although one Embodiment of this invention was described, the basic composition of this invention is not limited to what was mentioned above. For example, in Embodiment 1 described above, the convex portion 612b, which is the first abutting portion, and the second abutting portion 327 are provided on the cover portion 32 side. The contact part and the second contact part 327 may be either one or both of the cover and the flow path member main body as long as the first contact part is formed at a height at which the first contact part comes into contact with the second contact part 327. May be provided. That is, the first contact portion and the second contact portion 327 may be provided on the flow path member main body side, or may be provided on both the flow path member main body and the cover portion. Of course, the first contact portion and the second contact portion 327 may be provided on different members instead of the same member. In the first embodiment described above, the first contact portion and the second contact portion 327 are connected to the cover portion 32.
The first contact portion and the second contact portion 3 are provided in a region where the flow path member main body 40 contacts with the first contact portion.
27 may be provided in a region where the base portion 31 and the flow path member main body 40 abut.
Of course, the first contact portion and the second contact portion 327 are both the region where the cover portion 32 and the flow path member main body 40 abut and the region where the base portion 31 and the flow path member main body 40 abut. You may make it provide in.

These ink jet recording heads 10 are mounted on an ink jet recording apparatus. FIG. 12 is a schematic perspective view showing an example of the ink jet recording apparatus. As shown in FIG. 12, in the ink jet recording apparatus 1 of the present embodiment, an ink jet recording head 10 is mounted on a carriage 2. The carriage 2 on which the ink jet recording head 10 is mounted is provided on a carriage shaft 2 a attached to the apparatus body 7 so as to be movable in the axial direction.

In addition, the apparatus main body 7 is provided with a storage unit 3 including a tank in which ink is stored, and the ink from the storage unit 3 is stored in the ink jet recording head 10 (back pressure control unit 20) mounted on the carriage 2. ) Through the supply pipe 4.

The driving force of the driving motor 8 is a plurality of gears and timing belt 8a (not shown).
Is transmitted to the carriage 2 through the carriage 2, and the carriage 2 on which the ink jet recording head 10 is mounted is moved along the carriage shaft 2a. On the other hand, the apparatus body 7 is provided with a platen 9 along the carriage shaft 2a, and a recording sheet S, which is a recording medium such as paper fed by a not-shown paper feed roller, is wound around the platen 9. It is designed to be transported.

In such an ink jet recording apparatus 1, the carriage 2 is moved along the carriage shaft 2 a and ink is ejected by the head main body 90 of the ink jet recording head 10 to be printed on the recording sheet S.

Further, in the ink jet recording apparatus 1 described above, the ink jet recording head 10 is mounted on the carriage 2 and moves in the main scanning direction. However, the present invention is not particularly limited thereto. The present invention can also be applied to a so-called line-type recording apparatus that is fixed to the apparatus body 7 and performs printing only by moving a recording sheet S such as paper in the sub-scanning direction.

In the above-described example, the ink jet recording apparatus 1 including the ink jet recording head 10 provided with the flow path member 20 has been described. However, the invention is not particularly limited thereto, and for example, separately from the ink jet recording head 10. An ink jet recording apparatus having a flow path member equivalent to the flow path member 20 described above may be used. As an example of this, for example, an ink storage means such as an ink tank is not mounted on the carriage 2 but is held by the apparatus main body 7, and the ink storage means is connected to the ink jet recording head 10 via a supply pipe. In such a case, a flow path member may be provided in the middle of the ink storage means or the supply pipe.

In the above example, the ink jet recording head 10 is an example of the liquid ejecting head.
In addition, the ink jet recording apparatus 1 has been described as an example of the liquid ejecting apparatus. However, the present invention is widely intended for liquid ejecting heads and liquid ejecting apparatuses in general and is a liquid ejecting liquid other than ink. Of course, the present invention can also be applied to an ejection head and a liquid ejection apparatus. Other liquid ejecting heads include, for example, various recording heads used in image recording apparatuses such as printers, color material ejecting heads used in the manufacture of color filters such as liquid crystal displays,
Examples include an organic EL display, an electrode material ejection head used for electrode formation such as FED (field emission display), a bio-organic matter ejection head used for biochip production, and the like.
The present invention can also be applied to a liquid ejecting apparatus including such a liquid ejecting head.

Furthermore, the flow path member of the present invention is not only mounted on a liquid ejecting head represented by an ink jet recording head or a liquid ejecting apparatus represented by an ink jet recording apparatus,
It may be mounted on other devices. Moreover, as a filter used for a flow path member, it can be used not only for the flow path member and the ink jet recording head described above but also for other flow path members.

DESCRIPTION OF SYMBOLS 1 Inkjet recording device (liquid ejecting apparatus), 10 Inkjet recording head (liquid ejecting head), 20 Back pressure control unit (flow path member), 30 Cover, 3
1 Base part, 32 Cover part, 37 Fastening member, 40 Flow path member main body, 41
First flow path member, 42 Second flow path member, 43 Third flow path member, 44 Protection plate, 45
Film member, 46 elastic plate, 51 connection port, 52 introduction path, 53 pressure adjusting chamber, 54 inlet, 55 communication flow path, 56 filter chamber, 57 supply path, 5
8 Introduction filter, 59 Supply filter, 61 Air release path, 70 Circuit board, 80 Head case, 90 Head body, 100 Valve body, 327 Second contact portion, 612b Convex portion (first contact portion)

Claims (6)

A cover that can be divided into a base part and a cover part, and a flow path member body having a laminated structure in which a liquid flow path is formed,
The base portion and the cover portion are fixed by a fastening member across the flow path member main body,
At least one member of the cover and the flow path member main body is:
A first contact portion provided in the flow path forming region where the flow channel is formed and protruding toward the other member, and a second contact provided in a region closer to the fastening member than the first contact portion. A contact portion,
The first contact portion and the second contact portion are configured such that the first contact portion contacts the other member before the base portion and the cover portion are fastened by the fastening member, and 2 The contact portion has a gap with the other member, and the fastening member is fastened so that the distance between the second contact portion and the other member is shortened. A flow path member characterized by the above. The flow path member according to claim 1, wherein the fastening member is provided at a peripheral portion of the cover, and the first contact portion is provided at a central portion of the cover. The flow path member according to claim 1 or 2, wherein the flow path member main body has a laminated structure in which a plurality of members are laminated via an adhesive. A liquid ejecting head comprising the flow path member according to claim 1. A liquid ejecting apparatus comprising the flow path member according to claim 1. A cover that can be divided on the outer periphery, and a flow path member body having a laminated structure in which a liquid flow path is formed inside the cover. The cover includes a base portion and a base portion. A flow path member manufacturing method comprising a fixed cover portion,
A state in which at least one of the cover and the flow path member main body is provided to protrude toward the other, and the first abutting portion provided in the flow path forming region in which the flow path is formed is in contact with the other After sandwiching the flow path member body between the base portion and the cover portion,
By fastening the base part and the cover part with a fastening member, the base part and the flow path member main body are provided so as to protrude toward the other and provided in a fastening region around the fastening member. The second contact part is brought into contact with the other to fix the base part and the cover part.

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